If company has no license and no referrals I would not apply4. ask questions, don't pay for classes, read everything, know that numbers are reality and probably yours are going to be hit by the many unforeseen details: contractor dies on site (happened to me); lender lost warehouse line in May due to covid (happened) and even Goldman closed shop; supply chain delays and increased costs; tenant whose income never went down decided not to pay for a year or two and refused to work with government payments... stuff always happens5.

A good attorney should be able to handle this no problem (pending any unforeseen developments).

Or do investors tend to stay away from these due to the possible unforeseen costs associated with buying the property without seeing it? 

You should insure the property as of the closing date so any unforeseen catastrophic events are covered.

If the refinance loan doesn’t go through due to low appraisal or some other hiccup that could be unforeseen the tenant and the investor  are in a precarious situation.

We budgeted for $125,000 all in for the remodel; however, immediately after moving in, we spent $35,000 on unforeseen issues (Garage was built over the gas line, Pool had to be replaced after first use, electrical was faulty).

What happens in the case of unforeseen damage or worker injury?

I second Eliott's response - no one is going to do this deal for you.Pencil it out - add contingency reserves to account for unforeseen issues, make, and execute a plan. 

Looks like they are hitting you up for ~$20K in "contingency", which contractors usually build into a quote for if/when they come across unforeseen problems in the course of a reno.

Due to an unforeseen expense coming up on another property I am in the process of now refinancing it and will still be cash flowing about $500 a month once the new loan is in place.