If you are doing this for yourself then you don't need to figure in your time. As to the precision cutting, use a block plane or one of these http://www.screwfix.com/prods/52590...-Woodworking/Titan-D15-B10-A-Belt-Disc-Sander and you won't have to worry , just take your time.
As to cheap wood I assume you mean decent wood sourced cheaply rather than s cheap softwoods. Let it aclimatise in the house for 6 months or more and then put it down. But , if you're impatient ignore me and go with the other advice offered here.
Are you realy a lady ?? or a kitchen sink as the pic depicts ?? oh and will you be my friend ?
