This is a fairly new concept to me still, but I now see that multiple streams of income are definitely far better than one high income stream as you point out. I now work part time as a hospitalist. That job provides our biggest income stream, but I also work part time for an opioid treatment center, which could easily turn into a full time position if I ever needed it (the owner has told me “you always have a job here”). Additionally, my wife works full time AND she runs an airbnb room out of our home which pulls in easily 1000/month. Those combined with our investments in stocks/bonds give us 5 sources of income. In the past we relied solely on my full time work and it stressed me out knowing that at any time something could happen that could take that away from us (as you listed above). Since I started doing these other things and we diversified our income, I feel much more at ease and relaxed.
There are a plethora of tax write-offs available to real estate investors.  They aren’t quite so generous for those with a high income, but they still exist.  As a general rule, rental income tends to be a lot more stable than many kinds of income.  And sometimes, properties even appreciate allowing for significant capital gains.  Just remember that compared to a stock/bond portfolio, rental real estate tends to be more of a second job than an investment, even if a property manager is involved.
If you lease a car for three years, its residual value is how much it is worth after three years. The residual value is determined by the bank that issues the lease, and it is based on past models and future predictions. Along with interest rate and tax, the residual value is an important factor in determining the car's monthly lease payments. In capital budgeting projects, residual values reflect how much you can sell the asset for after the firm has finished using it or once the asset-generated cash flows can no longer be accurately forecast.

The most liquid of the private investments are investing in equity or credit hedge funds, real estate funds, and private company funds. There will usually be 6 month – 3 year lockup periods. The least liquid of the private investments are when you invest directly into private companies yourself. You might not be able to get your money out for 5-10 years, depending on the success of the company and upcoming liquidity events.

Hi, in as much as the article in this blog appears to be a source for information for us folks who are perhaps a little older (and wiser) would it be possible to point a person who is extremely sceptical about earning extra income.. other than worked 9-5 for? ( that person of course is me). Who now in a few years should be retiring, problem is, no money there to retire on. So a second source of income/investing is critical to my wife and I.
Camps, ski resorts, cruise ships, airlines, expeditions etc all may have need for part-time or full-time medical expertise.  Part of the compensation may be taxable income, or it may simply be opportunities.  For example, I work at a ski resort several days a month.  I take runs and a P.A. sees the patients.  If the P.A. needs me, I’m there in 5 or 10 minutes.  If they don’t, I get a free day of skiing in for my family and friends.  At the end of the day, I sign 4 or 5 charts.  Sure, it’s not much money (perhaps the equivalent of $100-200 a day in lift tickets and meal discounts), but it’s still an income.  When engaging in this type of work, look carefully at the liability issues.
But when so many turn down leasing one and one-half acre for one Wind Turbine for each 80 acres, that lease certainly does not materially affect the rest of the Farm or Ranch grazing pasture and the lease pays much more than the farm crow or grazing pasture lease, just because some lawyer said the lease was too long: 30 years plus 30 year option = 60 years, and the wind turbine company has selling production/electricity contracts for the next 150 years – which is needed to obtain financing!
BUT this is long-term. For example, it took me 2 years + to get 1000+ subs on Youtube, but I never tried to monetize Youtube. I also started Patreon (Adam Fayed is creating Videos and podcasts about financial freedom and passive income | Patreon) a number of weeks ago and that will also take me time to build up. But prepared to put in the hard miles.
You can source products through wholesale sites like Alibaba, or you can go directly to manufacturers with your designs and build things from scratch, although I wouldn’t recommend it unless you have experience in the manufacturing industry. For importing your items, you could either fly directly to another company to view production and product lineups, or you could simply turn to Alibaba to assist with that.
Residual income can have two different definitions or applications. The first definition, a less common application of residual income, is the money that is left after monthly debts are paid. This calculation is particularly important when a person is seeking financing or a loan based on their income and available money to cover the additional debt. In this scenario, the residual income is calculated by this formula:
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