The deal has to be good enough with your assignment fee included, otherwise nobody will want it. 

The Go Daddy vacation rental template was good enough for me and super easy.

Even if it does turn out to be terrible I've burned way more than 49 dollars on way dumber stuff in real estate, that is for sure.editHe probably does not remember it, but years ago I reached out to him and he gave me some great advice on a niche form of real estate investing, which is why I am saying if it is good enough for him it should be good enough for me. 

One of the hard things about being young is you don't realize perfect doesn't exist and you are looking for good enough. 

The cashflow is good but not good enough to replace my w-2 income, I like vacations, restaurants and enjoing life.

Or a loan from someone to make their bank account look good enough to qualify for a rental (weird but possible).

Are there any free tools that are good enough to help with market / potential investment analysis or would you recommend paying for a tool? 

I don't think they are good enough to handle situation like this.

One thing I’ve seen help BRRRR investors succeed is building relationships with a strong property manager early, since they’ll give you the best feedback on realistic post-rehab rents and what finishes are “good enough” without overspending.

If it's not good enough for them, why should it be good enough for an international developer?