In my mind it makes more sense to be managing the project to keep it moving along, while doing a portion of the work myself to keep costs down.  

I'm in the camp (tax-wise) that there should be a Flat tax or better yet, National Sales tax with no deductions for anybody or anything......so obviously the concept of depreciation would go away also.

So if you can collect rents into your business either by deeding the properties to your LLC (be careful of the due on sale clause on your mortgages) or by signing a master lease between you and your LLC and having the LLC sublet then that may help.

An STR that is poorly managed may leave the PM without his or her portion of the income, but it may set up the owner to lose the property if that cash flow was needed to pay the mortgage.

Would this cause any tax implication towards a future sale  of the home purchase?

I started investing in 2019, got my license in 2021 and was initially with a residential broker that was primarily focused on retail transactions (aka sales, purchases, leases, for regular end user folks). 

FSBO (for sale by owner) sellers get sued more than any other group in real estate.

This could help with sales and capital gains tax."

This will primarily effect tenant's sales and your ability to re-lease when tenant moves out.You have building risk: primarily, how easy will it be to re-tenant if your tenant goes dark or leaves.  

Explore the possibility of seller financing, where the seller provides financing for a portion of the purchase price.