Do I suck it up and go back into the industry that I disliked at the time and buckle down knowing I can bring in thousands of extra dollars per month?

And my extra work won't "pay off", it'll just be to get the same terms I already have.

However the seller has the option of cancelling and refunding the deposit (Which looks like what happened here).DISCLAIMER: I am not a lawyer, don't play one on TV and have zero firsthand knowledge of the contracts used.

Also they want to get a condo or a townhouse because its more comfortable and I am here dying in my mind thinking on HOA fees, not having an extra room to rent for house hacking, etc.My brother told me that one of the lenders told him that the loan options would be better if we both are in it (me as a cosigner) thing I refuse to do.

I have good experience that is interesting to new people and I try to answer their questions as best as I can from the knowledge I have gained thus far.

I'm being extra conservative being new. 

Raised the rent on all 4 to mkt rents & the one who was always late paid the extra $100/month & immediately started to pay on-time.

He's super knowledgeable and his firm is top notch.

If it's an SFR you could technically get a HomeStyle reno loan on it, but that would be a lot of closing costs and other nonsense just for an extra $5k.I'd suggest credit cards or other unsecured borrowed funds -- get it done quick and sell it quick to pay it off. 2nd best might be some sort of equity deal with another investor who has $5k to invest. 

I have a principle of 9K left on my car which I plan on using the extra savings to quickly pay it off so I can have an extra 350 to save and invest.