I’m close to saving up for a down payment but it’s taking forever!

We asked the owner if we could start painting the house before the closing date...

I am closing 4 deals next week for my rock star land flipper.. 

Most Heloc rates right now are around 7.75% to 10% so if you look at your blended rate between your fist and Heloc you would be better off doing a cash out refinance.A lot of people forget or simply do not know that if you do a cash out refinance the rate does go up but in 12 to 24 months if you do a "rate and term" refinance you can get it back down fairly close to where it was at prior.

I'm only at 3 rentals and just 1 tenant can make or break you trying to be a PM while also working a w-2, I've already come close. 

Fine - use what ever suits you.Mortgage acceleration is a choice, not a requirement.

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

Banks like proof the funds were in a bank well before closing. 

I've read BiggerPockets' Real Estate Investing book and am particularly interested in the house hacking strategy, as I'd like to move out of my current living situation.Our main dilemma is choosing between a single-family home (renting out one room to a close friend) or a multifamily property like a duplex or triplex.

In general, the higher valuation properties with views or close proximity to water have higher rates of returns.