You may need to move closer. A lot of tradesmen will say 'order me two tonnes of sand/blocks/2 by 4 etc I'm coming tomorrow' and you just don't have time to get the order in, you need to build a good relationship with your local builders providers (we were able to negotiate at 10% discount off our monthly statements at the start of the build, purely by arguing how much materials we would be buying). We started building May last year and are now at the kitchen -going in- stage. We went direct labour. Overall we are looking at perhaps only a 15-20% saving. Believe it or not this is a disapointment as at the onset, budgeting, we hoped to save at least 25-30%. But don't think of it purely in monetary terms (its hard not to I know). Even though it has been a nightmare, I don't mind telling you, co-ordinating things and having stuff on site etc. we have been able to see everything that has gone on and been onsite at every single stage. The advantage of this is that you decide on the quality of everything that goes into the house (and pay for it too mind), and you have peace of mind its all been done right and to your standards. Also you can make a lot of changes (and you will) that a builder would charge you a fortune for. I mean the reason we lost 10-15% of our 'saving' budget is we decided to use a bling bling type of insulation, stainless steel electrical fittings, extra external doors and so on these are things we decided on well into the build. Make sure your plans are accurate and consistant between tradesmen. On a side note you will have the negotiation skills to get 10-20% off a Mars-bar in your local shop by the time your finished, a life skill that can only be learned by a year and a half's painful giving away of money. One other thing I would say for your sanity if you do decide to go self build is put aside a budget for a weeks holiday in the middle to get away from it all with your missus and not talk about the house for that week. Hope this helps I'll send you my email if you would like anymore impartial advice cause I would have loved it at your stage, and good luck!