However, by that point you probably start to have a good idea of the rough costs and can put in an offer using rough numbers before needing to get quotes from a contractor.

This sounds like a good idea, but all of that matters of course for the ROI calculations.

I wanted to make a post about self-directed IRAs and holding vacation rentals like an Airbnb in them.

If you want to leverage for the purchase and reno of a deal, I suggest using either hard money or private money, especially if you want to refinance a deal and hold onto it as a BRRRR. 

Most of those lines of credit start with 12-18 months of 0% APR, and the idea is that you can just apply for new cards once that introductory period is up. 

I am currently renting but I like the idea of house hacking to start out.

Is it a good idea in general of just investing and hoping that cashflow will come one day? 

He works for himself but idea our go to fix a flip mortgage broker @Joseph Chiofalo..check in with him for financing options which might help with budget and strategy.

Not a terrible idea, but here's where I would urge you to exercise some caution. 1.

Any and all ideas and advice is welcome.Thanks!