I have thought about doing a HELOC but I feel like I am just creating another payment at a higher interest rate.

What is the going rate for a 3 bedroom detached?

Also, maybe they've been bought & renovated in the last 21 months.The real challenge is the advertised $105k value.Zillow shows a Zestimate of $59,600, RentZestimate $1,314Redfin Estimate is $67,444, rent est $1,089Realtor (dot com) estimates: ---Collateral Analytics $60,212---Quantarium $49,728---CoreLogic $67,264Please show us where you can find ANYTHING that supports their $105k price!

Some advertise very aggressively on Google, so you can just do a search. 

I currently have an interest rate of 10% from Live Oak Bank.

I would wait till rates eventually go down and there are real opportunities in real estate and take advantage of it then

What is your prediction on rental rates and multifamily property values in your market over the next year? 

(Urban, suburbs, rural) What population sizes and growth rates?

I'm in the position to apply(depending on lender DTI requirement) for conventional financing through the builder at <6% interest rate in this current market.

I had a similar experience also didn't get 2 of my properties rented by November after I turned over one at the beginning of August and the other mid September.I switched to another local but flat rate company who rented both in less than 2 weeks.