If you're just starting out, house hacking a duplex or SFH with an ADU can be a great way to reduce living expenses while building equity. 

I am currently looking to build a spec home and use my equity to help finance the build.

BRRR/house hack/str/mtr/ltr.... leveraged equity building vs. cash flow).3.

I’ve previously used my equity line, but I’m in the middle of remodeling and can’t use it now.

Yes, you can do a refinance to tap some more of the equity on the property.

Quote from @Min Zhang: Investment Info:Single-family residence fix & flip investment in Columbus.

And right now the bigger cabins are not a good cash flow play but might be a great equity play when you look back in two to three years.  

Investment Info:Single-family residence buy & hold investment.

But for the last 3-4 years local residents have decided it was cheaper to just take the groceries. 

I invest in Boise, ID and do quite a few BRRRRs, LTRs and STRs- varying degrees of success depending on how much equity we can force and the type of back end financing we can find, but the tax benefits are great and it's a rapidly growing market and Idaho is probably the most landlord friendly state in the nation.