a good cage is a signifigant investment for your car . but $ shouldnt be an issue when when it come to the saafty of you and your family and friend in the car ..... beleive me wheni started this little adventure i thought the same thing , ahhh ill just do a little trail riding nothing serious , ya $27000 later my car is far from stock . but its SAFE !
im not saying youll have the lack of self control i have, just dont scrimp on the important things !
save your money and do it right the first time. you can shop on Craiglist for a seat and harnesses , that can save you a little . hop other forums for sale . there was a member on here i think that had a really nice 4 seater cage for sale , havnt heard if it still is .
as for service . no you dont need the bed up or the cage off to do any kind of maintinece .