Trailer hire would be a lot cheaper than repairing a buggered gearbox and/or front suspension and steering components.
Where would you get the A-frame from anyway?
Buying it would cost more than trailer hire and it would probably need to be adapted to your car.
The materials required to make one would cost more and be somewhat dubious in the safety dept!
Hiring one would still cost and still need to be adapted somehow, I doubt there is such a thing as a TR7 A-frame available off the shelf.
As I said........not worth the pain and suffering
I recently moved house, not far away....@ 5mins up the road.
My TR is suffering from a buggered clutch fork (again!
I didn't think twice about shoving it on a trailer, I had planned to hire one, I casually mentioned it in passing to one of the clients and he offered to lend me one belonging to one of his mates.
He's a top bloke as he also lent me a huge machinery trailer to shift my lathe, milling machine and other large heavy stuff that needed a crane to shift.
I used to own a car trailer, a big bastard with a 16ft deck.
I found it was cheaper to hire one than maintain one.......not enough use to justify the agro of ownership so I sold it.