Hilton gives 10 points/$ on Homewood Suites, and for that kind of travel pattern, I'd prefer something with a proper kitchen, especially if you're going to be there for all or some weekends.
Rumor mill says IHG is going to introduce new Spire benefits in 'November', which may or may not intersect with your future travel needs and desires. But worth monitoring in case they turn out to be something significant.