Then sell on the side, extra pipeline for revenue. 

Being furnished is also extra work, more things to break and be maintained.

Or maybe you already own a home but could use some extra income or a designated space for aging loved ones.

I am under contract on a property that looks like it will not close.When I got the 3 fireplaces inspected, it was only a few hundred dollars extra to chimney sweep them at the time of inspection so we paid to get them swept. 

Now that they know that the CURRENT system is expensive to run, they want me to foot the "extra" cost that will be incurred until the new furnace is installed.

A solid rule of thumb is 10-20% extra in your budget.If you’re looking for a solid resource, J Scott’s The Book on Estimating Rehab Costs is a must-read.

Otherwise, you won't have the extra funds necessary to cover the rising costs of goods and services in the future.What causes rents (and prices) to increase?

. - For the right people (landlord who wants hands-free ownership but achieve higher than normal LTR rate, and arbitrager who has the skills and extra bandwidth, AND has confidence in their own ability), I think this kind of arbitrage model is a win-win.I'll be operating in the Triangle area. 

But that extra $100k beyond that....depends on what you used those funds for. 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!