Most recumbents are a really good value and will be similar in price to a conventional bike of the same quality level. Year by year recumbents are coming down in price as the sales go up and production of many have been moved to Asia. Also consider that there may be more involved in the construction of a recumbent, just look at the seat. Recumbents can be slightly heavier or as light as a comparable conventional bike. But remember the advantage to a recumbent is greater efficiency and aerodynamics.
Weight plays a much smaller factor.
As for transporting, recumbents will fit on most bike racks. Sometimes attaching the bike to the rack needs a little extra attention. If you have not bought a rack ask your recumbent professional which racks work best. Long Wheelbase, short wheelbase, underseat steer, overseat steer, recreational, tour, speed, commute, there are many designs. It is important to not spend a lot of time looking at brochures and photos of recumbents making personal observations as without trying the bikes your observations are usually wrong.