You are correct in saying it's a business, many ABB people feel they are doing someone a favor by renting out their property.
My advice is to get visibility by getting reviews. Do your own research in your area for what others are charging, look at the suggested pricing by ABB and make a decision on your own about pricing. I have found that ABB prices much lower than I need to keep my bookings at the level I want.
You are trying to get top visibility in your market you do this by:
1. Be responsive, answer all inquiries ASAP.
2. Don't cancel, ABB will ding you and put you on the bottom of the list.
3. Get great reviews, most renters will make this the top reason for booking and ABB puts top reviewed hosts at the top of the listings.
Although you should always go "over and above", in the beginning you need to make sure you go even more so over and above as great ratings result in great bookings.
As far as two rentals, put them both under the same profile, it makes you look more substantial.