Have you seen the prices of 10spd lately?
The the STI alone can go for £100+
BUT!!!!!
Have you thought of MIcroshift? 10spd shimano compatible for £79
Find many great new & used options and get the best deals for MicroShift Gear Set 10 Speed Road Bike Drop Bar Fitment at the best online prices at eBay! Free delivery for many products!
www.ebay.co.uk
and a 'reasonable' wheelset
Deep Double Wall V-section RDK Alloy 6061 T6 Rims. 30mm deep profile ! 20 Spokes front wheel, 24 spokes rear wheel. Black hubs, black rims, black stainless steel "la pierre" spokes, rims have cnc braking surface.
www.ebay.co.uk
Thats just ebay, if you shop around a bit you can get something together for not too much
With Shimano
road you can use 8/9spd rear mechs and many front mechs with ten speed sti which saves a bit of money
8spd wheels will accept a 10spd cassette with no issues except in some cases you may need a small spacer before the cassette goes on
If the above doesnt tickle your fancy;
I do have some Ultegra front and rear mechs, some reasonable Maddux (Quando/ Cannondale) 700c wheels, a ten speed cassette, chain and some 10 speed Dura-Ace bar end shifters.
Theres some black Dia-Comp brakes to but you'd have to find your own brake levers
price would be around £150 posted but I'd give the above a good look first