I think the bowling alley thing can be done much cheaper if your timing is right finding a used pair of lanes at an auction as bowling alleys seem to be closing up every where these days. You can probably get them for $1,000 per lane but the big problem is shipping costs which will probably be several times your $1,000 per lane. I've seen smaller bowling alleys in the past giving them away but you need to get the lanes out by a certain date. Space is also an issue as you need like 85 to 90 feet for the 60 foot lane bed. Twenty feet for the approach and room for a pin setter. There is a house in my sub divusion that was built by a family that owned Pontiac dealerships...built adout 15 years ago. They put a new pair of lanes in the basement and the alleys stick twenty feet out of the side of the house. They put a slightly raised patio there where the basement juts past the house