You can build a custom home for the price of a spec home. However it means sticking to the budget instead of upgrading. You can put a $15 light fixture in the bedroom, or a $50 one - spec homes do the former, custom homes all later - it doesn't seem like much but these all add up. The cost to build a custom home and a spec home is nearly the same if you are careful not to do any upgrades. Those upgrades cost money though - if you are planning to live in the house for many years I'd say they are worth it but be aware of what you are getting into.