The reason the prices are lower is because of a current Land Lease that is set to expire in about 44 years (you are no paying for the land)
Because of it's proximity to GU and closeness to Metro renting is fairly easy.
It depends on how you are going to finance the transaction. There are limited air rights for the building, so getting financing can be challenging. There are many great deals to be had and it is a building that rents well and units move quickly.
As for looking for condo building, each building is different and a few have rental caps on them. It depends on what you are looking for and your price point.
Please let me know if you have any other questions or need any assistance.