Depending on how good the GP's prior returns have been & marketing strategy, they can raise 70-95% of the total equity required to take down their next deal. 

Most states will not charge you any transfer taxes however I have heard that some states will charge some sort of transfer taxes. 

There is a tax benefit and you can welcome him to pay you back but not have an expectation.

Risks such as regulatory, legal, financial, tax, and integration must be assessed and managed to proceed with a planned deal.

I went to the county assesor and found out the taxes are current and no back taxes are owed.

Note prop tax will be ~$200/month on the ADU.  

Meanwhile, while you wait for an uncontrollable event like appreciation, you are losing $1,000 +monthly if you have 100% occupancy on a LTR at $2k per month.( prop tax, insurance , mortgage)Cut your loses.

Extremely high taxes and maintenance costs plagued by huge inventory sitting in the market. 

Hello all, we are very green in understanding tax strategies for STRs and we're trying to understand how/what STR tax deductions can be captured for primary residences. 

This would depend on local municipality requirements.