I’d like to put as much down as possible with  conventional loan.

Most if not all of these properties require SIGNIFICANT cap ex rehabs and conventional financing won't touch them; you'd likely need to go the hard money route at 10-12%, 2 points, 12-18mon turn around.

That is important when considering a conventional conforming loan.

@Summer Shelton, FHA allows you to use rental income and so does Fannie Mae/Conventional loans.

I am looking into my first property and have been pre-approved for a renovation loan from a conventional lender.

Once the rehab was done I refinanced out of the private loan into a conventional loan as a primary residence.

You won't be able to use conventional financing and must use a non-recourse loan which typically require 40% down.

Two separate property appraisers (at the direction of the lender) were sent out to appraise, and neither was willing to appraise it as a "residence", and thus financing fell through (conventional primary loan).

I was wondering between FHA and conventional.

As someone relatively young, obtaining a conventional loan has proven challenging for me.