It depends where u live, and where your playing.
Indoor football develops a players skills, ball retention and their ability to work is small spaces; as an indoor field is much smaller than an outdoor field.
It Would Cost About $450,000!
If it is just the Indoor soccer facility with no tennis courts etc. it would be around 800,000. but it varies on the land you buy, were its being built, etc
According to NJ.com the Red Bulls Arena in Harrison NJ cost $150M. It opened last year
Money For a indoor football field is @ 100,000 $ I know.. My Kinfolk has One.
and could also be used for soccer
It cost $75.00 to get into soccer
Indoor skydiving is currently not available.