If I were to get my park back up and running, I would be adding the ability for the trucks to plug in (cut down on generator noise and exhaust - I would charge for access or build it into the rental fee, and most food truck operators would love this option), add real bathrooms, and add other features as an additional draw to get customers for the trucks. 

It also comes with an additional 5 acres highway-commercial zoned, so we are going to put up a bi-directional billboard.

Additionally, if the single-family home is used as a rental property, you can benefit from depreciation deductions over the property's useful life, which you would report on Form 4562 and deduct on Schedule E (Form 1040).

ADU additions typically cost more than the value added.  

This is a capital gains tax free sale of your personal residence ( up to IRS limits ) and not a loan that will affect your DTI ratio.

Additionally, I'm curious about any challenges you might have faced during the process and how you overcame them.

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provide support for the property tax appeals process.

A Capital Gain (or loss) can only occur after selling a property.  

I would make sure I would be the only one entitled to the difference of the 375/235 price because again he is going through a divorce and don't want to get into a mess where the significant other is trying to gain profits from that sale price.  

Quick question, I’m in California and will have a sizable, capital gains tax bill owed to the IRS and the state of California in the near future. my question is how quickly does the capital gains tax liability need to be paid?