@Gary Love
I like the way you are thinking, I did this same thing. A few things to consider are: you can use 75% of market rent on your current house to help you qualify for the next. Conventional 5% down payment loans are great. I used to think the same way as you on the not tapping equity, but you should calculate your return on equity to help make this decision, I would consider taking out a home equity loan or HELOC while it's still your primary residence, you probably don't want to do a cash out refi if your current rate is super low, but do the math. Have your lender price out prepaying instead of monthly on the PMI on the new purchase (I did this once because it was half the price, I didn't another time because it was basically the same price), or you might just plan on doing a refi on the new purchase in a couple years to remove pmi and possibly a lower rate or consider doing an ARM. When buying a primary residence, buy in the best neighborhood that you want to live in, this will help with appreciation, but also run the numbers as a rental so it will at least be close to cash flowing. Good Luck!