2.5 V6 24v Busso engines are plentiful at the moment... IMHO, it's far more viable to buy a second car with a decent engine, hire an engine crane for a week and swap them over but in the meantime during the swap and ancillary parts transfer, do the waterpump, all idlers, both tensioners and both belts while the good engine is out... It's a lot easier with a lot more room and the ability to free off pulleys with ease.... You can also give it a damn good service too.
Buy a break down or mot failure locally
Clutch, gearbox, ecu, suspension & corrosion of floor pan issues are the ones to go for and you end up with a decent second car to strip for as little as £300... Sometimes it works out even better with alloys that may be in better condition with better tyres, better exhausts and better interiors... An added bonus is recent cam belt changes etc. saving even more dosh!
The best bit is: when you are happy and up and running again... A local breaker/salvage will come and remove the other shell away and pay you for it... You can even sell the interior and wheels, induction tubes on Ebay in the mean time.... Before you know it, your intial outlay of buying the second car has paid for itself
Everyone wins, it's not the end of the world mate