A follow up question is, how much is expected in reserves using this method?

I'm assuminh that if I do the latter, then I'd also use my personal account for repairs, maintenance & improvements to my unit as well.Is there some other method?

Probate requires a different approach than many other methods, but because of that, it could set you apart from other "we buy houses" wholesalers.

we did not do the refinance to get the money out , the BRRR method. 

It may be possible to obtain a funding using this method.

If there aren't comps there I personally would value the property relative to its potential rental income using either the gross rent multiplier or cap rate method. 

On what to expect any learned methods that I could apply?

To give a little background, my aim is to focus mainly on BRRRR investing using what I've heard in the podcasts referred to as the "Stack" method: starting with SFH and working my way to small MFH and eventually Commercial MFH. 

This method becomes much much harder as you get older, ask anyone in the REI game over the age of 40...

What payment method do you all prefer when it comes to accepting rent?