2 family homes are great for an owner occuppied situation. Investors prefer at least 3 units to make the #s work. If you've made improvements to the home you have built equity already. Depending on when you purchased and how much money you put down on the investment will help determine if now is a good time to sell or now. If you are looking to sell and then buy, and you won't need to bring $$$ to the closing from the sale then now is as good a time as any to do this. In fact, it might be a better time because there are incredible deals to be had on a purchase right now and our inventory in Ipswich is very low.
Hope this helps.
Feel free to contact me if you should have any additional questions/concerns.