Down payment for multiple family unit

[Arta Montero]

Wondering if you all can give me some advice about how to go about proceeding on this.

We have about 170k in contributions to ROTH IRA. We have three houses. One fixed interest at 3.5% (180k), one fixed at 3% (405k) and one that is not fixed but varies with market (120k). Based on current market rate we paying about 4% right now.

Wondering what is the best way to prepare for a down payment and how to best manage my savings from here on

1. Should I pay rental house that is not fixed rate (120k) first. May take me a couple years to pay off. In this case I have to use ROTH contributions to pay for down payment if I decide to purchase in next couple of years. This could be a problem if stocks are down when I decide to buy

2. Should I save everything from here on and not pay the 120k house? This will also give me more flexibility if I decide to purchase something that requires a down payment more than 170 k?

Thanks!