Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX metropolitan statistical area. Bexar county includes Government Canyon state natural area in northwestern part of the county.
If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
Most projectors top out at about 2:1 throw ratio, giving you a minimum screen size of 14.5x8.15 FEET! That screen would have an area of 118 square feet, requiring almost 1200 lumens to achieve 10 ft-l of brightness on a unity gain screen, sort of a minimum acceptable level.