I think generally I’d be interested in using the brrrr method so finding properties where I can be all in with rehab at 100-125k and then hopefully with an arv of 150-180.

I really like your advice though, I might actually adopt that method going forward. 

Is there good way to approach this or is there alternatives to this method?

Time and money are the two things you can offer, both are forms of currency, and you can trade one out for the other.

With that method, you would have a duplex that you can rent both sides out cash flow and you put little money down and you would be living basically rent-free in the new duplex that in a year will be able to cash flow.

Here it looks like the trade off for the guarantor is just risk of default which seams very low if it's stabilized at this point. 

Our third option is to keep our current residence (which we have a great interest rate on) and invest in a property under 100k using either the BRRRR or turnkey method. 

To get better pricing you should drive by construction site and ask the different trades for their number.

Currently researching the best method for us to obtain our first property and which type of property that would be.  

My wife and I are reading and researching multiple different methods of investing.