I wanted to DIY this on my second house hack, but decided to contract it out as I was not able to properly finish/texture it on my own.

A borrower is much more likely to walk away from a deal with no skin in the game, and lenders aren't in the business of flipping houses.If you can get a conventional loan, go for it. 

Borrowers always need skin in the game. 

So a sponsor that's great for one investor will probably be terrible for another (and vice versa).I'm a conservative investor, so when I invest in multi-family I prefer sponsors that have at least one full real-estate cycle of experience, little to no money lost, low leverage, and high skin in the game.And there is an apartment operator that has multiple real estate cycles of experience (decades) with no money lost, low 65% less LTV, and high 10%+ skin in the game.They market under 506B so are prohibited from posting publicly on the Internet and instead function by referrals.

you can get them on ebay for like $5 for 5. also, i have a skin on my phone so that when i drop it, it doesn't shatter. i drop it a lot!

That way both have skin in the game and works out better for you.

It had alot of mold from leaky pipes , we removed all the drywall in the entire house for about 600 bucks all new drywall installed with texture for 3,100.

Good luck........but don't let them win by getting under your skin........anyone who would destroy another person's property is nothing but a loser anyway, but you don't want them to say you gave them aggravation while they were living there....I had 3 bad tenants in a row here in Florida, I never believed the other landlords who said I was too nice and had sucker written on my forehead, but now I know why most tenants I interviewed said there were nothing but slumlords out there.........not true....what was true was what the realtors all told me, that I was too nice and believed ever sorry *** story they gave me.....My home was so gorgeous, If I showed you the before and after pictures......OMG.....don't think I'll ever want to be a landlord again....flip homes yes, but I'm burnt out...and this never happened in NY, so I feel for you......But God sees everything.....so just do what you can within the law ....they'll get theirs eventually

Lot's of different ways to skin it.  

I probably wouldn't sand as that may affect the texture of the wall.