Can understand your concerns. Starter - now turning an engine with more compression? Air Con compressor - a) pulled around in the engine swap; b) was it working B4? Seems excessive to swap out and regas. Washer tank could have been moved roughly or hit during the transplant. Lots of rasons for DIY (if possible for you) here. Bit too far for me to drive from Perth to help you......
Good - Fast - Cheap: Pick any two.
3 x E32 735iL (Alpine White, Glacier Blue & Kashmir Beige); 2 X E38 735iL (Oxford Green & Alpine White); E53 X5 4.4i (Pearl Beige); R50 Cooper; R55 Cooper Clubman (Both Pure Silver).
E38 Parts Car
E21 318i; E23 735i; E30 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i
I've just changed my wiper blades and now my reverse lights don't work. Should I change my fuel pump relay?