You may be struggling to find a tax professional as these options are not available until you own have at least one property in your portfolio. 

Typically higher down payment and higher interest, but an option nonetheless. 

So, here's a vague response - go with the MOST EXPENSIVE option!

I know @Jake Baker is a great option if that's the route you decide to take 

There isn't going to be much of an opportunity to improve the value of a new build through a remodel so unless your discount is something along the lines of 20% or better, this may not be a good fit for the BRRRR strategy but that doesn't mean that it isn't a good opportunity for a different strategy.Just thinking out loud, maybe it could be a good fit for a lease option or rent to own play.

Option 3 is the most work but best return.  

One popular option is multifamily syndication, which has a lot of potential for scaling up.

Junking back here to see if there are any HELOC options now?

I will list a few options below, but the TLDR version is I may be able to help you with the Dispo side depending on the deal structure and comps.

What are my options, if any?