I think most people are reading into the scenario a bit too much... we're not looking for luxury and lots of sq footage, American entitlement, etc, but a bit more practicality would be significant.
@Nathan Gesner and @Steve Vaughan, there's also no need to save for a home as we'd own our home free and clear before selling it; I know there was a lot of info in the original post, perhaps too much. We'd have some money to invest after selling the rental home and we'd be free and clear on our primary as well, just to clarify.
As to the income, many people on here can attest that it's actually not hard to live on $50k when you have no mortgage, no car payments, no other debt, you have health coverage, low taxes, etc, and fortunately that number goes to $60k next year without considering any other cash flow (purchase of rentals, may pick up part time work myself for extra savings, etc.). There's also plenty of flexibility for extra hours/income if it were needed, but the idea is not to run ragged in favor of the almighty dollar so long we're constantly improving our balance sheet.
But I'm tending to agree, that by the time we rent a year, I'll have spent as much as half a rental home in some Midwest markets... so we're opting to keep the house we're in for another year and reevaluate as we go. There's a sad history tied to the home we live in, hence the desire for a fresh start, but I won't get into those details here. The idea is to get a bit more home on less land, so a lateral move rather than moving up. The only reason we'd like to be renting is to go back into the market as a cash buyer rather than subject to the sale of the current home and so we're not rushed into a purchase. Even if we waited a few years, that's not an ideal way to buy a home in my opinion; it's optimal to be able to buy cash without the requirement of selling your existing home and relying on the buyer's financing coming through.
@Joe Splitrock I'm actually pending a call with my accountant regards the rental home and how that's looked at from a tax perspective. It gets complicated with this property being that it wasn't purchased as a second home. I can't remember all the laws there, hence the call I'm waiting on. And yes, I'm not too worried with missing out on some appreciation with rates climbing; again, renting would mean I could go to the table cash, which should make up for some, maybe all, of the costs of renting for a year. Though that point is moot since we've decided to keep our primary for now based on the feedback here.
Thanks all