Thanks Brett and Colin
Some great information thanks.
Good to get insight too from people who have used them.
Colin, I think what would really help would be if my wife would agree to let me build an obs. This would save me significant grief with lifting and setting up equipment all the time. She isn't having any of it though!
She did agree a few years back, then she backed out and made me plant an apple tree in the area I cleared out.
Oh well, maybe get a trial membership and she what it's like perhaps.
Thanks Gav