It's the classic risk/reward choice.

Throughout the project I act as the bookkeeper, I do the occasional odd job like setup wifi, security, and give minor feedback on some of the design choices. 

I'm sure he has a ton of insurance brokers that can assist you. 

A title company that also serves as a QI (or creates a separate entity to do so) is just trying to add another revenue stream.

Keep your eyes on the prize, don't give up, and don't be hesitant to ask other professionals in the field for guidance and assistance. 

The seller is refusing to release the funds, that's not the agents choice.

I’m not saying anyone should rent if that doesn’t align with someone’s long term goals, I’m just saying that in most cases if your goal is only to be somewhere for a few years it makes more sense to rent, real estate isn’t magic you just simply can’t create a deal out of thin air, margins are the margins, rates are the rates & you make a plan based on that, but there’s not some secret way to make money, even off market deals I’ve found are often worse margins than on-market deals.

It also reduces the chance of him saying "no" as he has 3 offers so what other choices are there?

Keep an eye on the latest trends in real estate investing while creating a plan for moving back home once again.

Lots of choices with Mentors.I too have seen many do quite well with what they learned..