To maximize my cashflow and gain landlording experience, I’d do STR and MTR in the other units, as well as the other bedrooms in my unit.

Maybe your wife would be willing to take a lump sum based on the equity in the Air BnB. 

If it's an RV "stopping spot" on the way to some tourist area far away, no. 

Don't take out a HELOC Jason, it's not worth the time it takes for the amount of money you need.

I have two separate bank accounts (account "B1" and "B2") at the same institution. 

Also with cost seg how it now affects the way I actually file on those two properties.

The Plan should be based on moving cash through investments.

Very foolish of her, because the correspondence on the platform suggests the exact opposite.  

This means that when you sell the property, your adjusted tax basis is lower, which increases the capital gain you must recognize.Additionally, any accelerated depreciation taken is subject to depreciation recapture at a higher tax rate (up to 25% for real estate assets) rather than being taxed as long-term capital gains.So, while cost segregation provides significant upfront tax savings, it also increases your capital gains tax liability upon sale unless you use a 1031 exchange or other tax-deferral strategies.You can find your current tax basis by reviewing your depreciation schedule (Form 4562) and prior years’ tax returns, specifically looking at your adjusted basis on Form 4797 (for sales of business property) or Schedule D (for capital gains and losses).Your CPA should be consulted prior to making any decisions. 

I haven’t personally heard of anyone going the SB1079 route, but I have done some research on it.