I would say 15 gallon landscaping and find out what us most popular look for your area. 

It's very popular with military families.

@Joe Xie if you are looking for just the credit/background then the SmartMove product is a popular one on BP, https://www.mysmartmove.com/

This way you can have the basics on the applicant prior to showing and do a more in-depth screen / reference calls after they see it.Also if safety is a concern having basic information on the renter prior to a showing greatly reduces any safety risk.This also gives you the advantage of not wasting time showing the unit to less-than-serious or unqualified applicants.Of course you have to do a good job at marketing the unit so you have enough people interested to be able to request application first.We've found this to be a very popular combination for our landlords.

It was quite popular with investors because it is essentially a conforming loan, however it had no appraisal requirement and expanded limits on the number of existing properties an investor could own.

Your customers are the buyers not the sellers, contrary to popular (and misguided) belief.

I have noticed flipping is rather popular here, as most properties I see get snatched up rather quickly only to return to the market a month or so later.

If the tenants are a book store, video rental store and a retail electronics store I would adjust the return I  would require way up because there is a lot of risk in those type of tenants.If the tenants were a hot, new concept restaurant, a starbucks, a yoga studio and a nail salon right beside a popular bike trail I would up my price to $3.5 million :)

The top sites I have found are militarybyowner.com and ahrn.com, and the base housing site directs people to homes.mil (though it doesn't seem to be a very popular site).

It is possible even with a modest income in an expensive market like Hawaii.The ones that succeed usually give up the popular "I want to get rich quick mantra."