I am wanting to present to NASA and others a mission architecture for a combined Phobos-Deimos (PhD) mission using Falcon Heavy launches, Dragon capsule(s), maybe BEAM habitat, maybe a Centaur upper stage, and maybe solar electric propulsion.
The mission could preposition a hab and supplies at Phobos, use aerobraking, and leaving all but a capsule in a highly elliptical Mars orbit (HEMO) in order to minimize the propellant needed. Transfer between Phobos and Deimos could be done via Dragon capsule or if not sufficiently capable then just the crew with a propulsion pack.
This project could be part of the work of a Space Development Group which develops a set of mission architectures for the low-cost development of the inner solar system. Check out LunarCOTS.com. Thx.