However like @Matt Popilek said finding a trustworthy and reliable PM company is no easy task.

You should ask around to see who is trustworthy and who has paid fees in the past.

Third, I'd want to know if they do tax planning and are actively involved in estate planning, trust accounting and asset management aspects.If you get a positive response in all three of these areas you have a home run on the technical side.Gauge their ethical manner, their personality, would they be trustworthy as an advisor (you don't want a drunk and there are many).Know how they bill, ask about a quick question and any retainer fee and hourly rate.If they do not have the CPA designation (not really required) ask what their education is and what certifications they do have.

Your credit is a measure of financial trustworthiness.

They are not the most trustworthy financially but her father sogned something stating he would cover rent if they had any problems and he has made good on this once so far.This place will be stunning once I'm done, I figure all I need are two families willing to spend bigger money to rent a beautiful place or one family willing to one day buy it for what I've got into it.I have LEARNED SOOOO MUCH HERE, and not only that I have been building an amazing network of laborers who help and teach me so so so much, it's been one of the largest learning experiences of my life!!

He is honest and trust worthy...He now asks to team up with me to flip...

If you have a strong relationship and they are 100% trustworthy, then this may be a viable option. 

Having them tied to our long-term success was a big factor for trust, but they were also both just extremely kind and trustworthy during the process.

It doesn't mean you shouldn't invest in it but you should have a network of very trustworthy people in this town that you can rely on to monitor your property.  

Everyone can get rich in Excel so what you have to figure out is if the sponsor is trustworthy, has proper internal controls set up, and if their financial model passes scrutiny.