Hi @Jennifer McPherson, You will not qualify for 1031 Exchange treatment if you were living in the house as your primary residence. 

You're making this overly complicated.Short-term rentals are complicated as is, and have different tax treatment than traditional, long-term rentals. 

If you can hold it long enough to get capital gains treatment you'll save some tax, or better year, get a Roth and do your flips in the Roth... no tax (but leave the money in).

Hi @Cris Mullen and @Alex Uman, The house was not held for rental, investment or business use, so you will not qualify for 1031 Exchange treatment. 

In this case, it depends on the tax treatment of your LLC's.

However, I have heard of one case where the lender required a "whole house" arsenic treatment system, which are about $2500-$3000 installed. 

If you purchased that property primarily for resale (fix n flip) then it does not qualify for 1031 treatment. 

@Jason RuelloAs said below, 5-10% of monthly rent should be allotted towards TRR (treatments, repairs, replacements).To get a more accurate number or capital expenditures, you can examine the age and state of major items of the house such as the roof, HVAC, water heater, etc.

Depends on how the foreign business is treated under US income tax law, and what treatment you elect under the check-the-box rules if the foreign entity is not a per se corporation for US income tax purposes.I strongly recommend you speak to your tax professional. 

For this reason, many self-employed, tax status traders do their trading through a wholly-owned corporate tax entity, either S or C (usually S), to open up retirement and health insurance planning opportunities.Second, you should talk to your tax professional about a Sec 475(f) election, and the interplay with the QBI deduction thereunder, taking into consideration Specified Service Business Treatment and phase-out limitations.