If you’re mechanically minded , can weld and have a decent tool set, I’d say go for it, but if you can’t weld to a decent standard that will last and pass and MOT , I would still find someone , you don’t want to weld it up and then 6 months down the line , need doing again.. welding is witchcraft.. god I wish I could do it to a good standard, but it’s a snotty mess and I have not got the time nor patience. Can do everything else.. I do wish you good luck, it’ll be emotional, once you get that grinder out, no going back!I am looking to hire a unit short term and do it myself I can see the biggest job would to remove the body there may be a unit I can get for £100 per month not sure what supplies are available but if there is are decent beams over head I will block and tackle the body
And absolutely make sure you have someone with you while you weld / have body off, under the car while welding , fire, sparks etc, best to have someone spot you and keep eye out , more for safety than anything