Unless it's prefab house(aka modular home), it's gonna take you at least 6 month from the signing the contract of getting a lot to the house fully built. Labor market have been really heating up too - most of the builders are focusing building $1MM+ homes in premium districts definitely not worth their time to build a $300k home when they can build a million dollar home. If you are building the home yourself, good luck it's gonna take longer even if you are not working full time and can build house full time.