Welding 5-8mm steel box-section tubes

[IanParkin]

I have all types of welding gear gas oxy/acy arc welder mig and tig

but for a starter set get a mig 160-180 amp and a rent free large bottle
you should be able to get that for £100-200 and £100 for the bottle or rent one from boc if you think you may only want it for the one project.. or you dont mind paying £40 a year for ever
This will do all you want with mild steel and be nice and easy for you to learn with
Dont think about gas free sets or using the small disposable bottles.
and if you can get a set with a euro torch though that may be difficult at £200 budget

My 2p worth

Ian