would look like shit and have surface rust with mild steel, stainless steel ftw
most places would be 2.5-3k for that sort of work
try C-red my mate got quoted 2.1k for a similar setup (gt35r high mount, greddy intake)
or rent a car trailer and tow it to all the workshops
can also try Embelton engineering in Myree
or you can go to go gear and buy all the pre bent/cut pipes then get them to weld it
or use silicon joints