Question Rear projection screens and use advice

[kep55]

Our church will need a pair of rear projection screens to use in a space about 65'x54'. The first row of chairs will be around 20' away, and we'll be seating around 120 - 150 in two blocks of six chairs wide. The screens would need to be portable / folding away. Being a church our resources are limited.
My questions are these.

1. Would a 135" diag. meas. screen be the right size?
2. Would we need a special projector or set up? We currently have Epson Pro G7805 projectors.
3. Any guestimates how far behind the screens the projectors would need to placed?

Thank you for your assistance.

 

[Eximo]

Throw distance calculator, should come in handy.

https://files.support.epson.com/pdc/eai/html5/index.html

As for audience viewing distance:

https://www.projectorscreen.com/projector-screen-calculators

(They also have throw distance, and brightness calculations)

Based on these sources, your audience is well within appropriate viewing distance, being at most 25-30' away?

https://www.amazon.com/Elite-Screens-Designer-135-inch-ZRM-135HW-CINEWHITE/dp/B00MJBMTG6

I can envision making something very simple to stretch the material between two uprights with fold out supports, then you just need a top and bottom length of tubing to hold them apart the appropriate distance.

Aluminum square tube would make it very light and somewhat easy to work with with decent rigidity. Round tube might be more gentle on the screen, perhaps a combination. Square for the uprights, and round for the width.

Wood would work as well, but I'm not much of a carpenter.

Lots of cheap collapsible screen systems out there, but you could cannibalize them for parts or put in your rear projection material in place of the standard material.

https://www.amazon.com/Elite-Screens-Master-Outdoor-Projector/dp/B00MAPCZEM

 

[kep55]

Throw distance calculator, should come in handy.

https://files.support.epson.com/pdc/eai/html5/index.html

As for audience viewing distance:

https://www.projectorscreen.com/projector-screen-calculators

(They also have throw distance, and brightness calculations)

Based on these sources, your audience is well within appropriate viewing distance, being at most 25-30' away?

https://www.amazon.com/Elite-Screens-Designer-135-inch-ZRM-135HW-CINEWHITE/dp/B00MJBMTG6

I can envision making something very simple to stretch the material between two uprights with fold out supports, then you just need a top and bottom length of tubing to hold them apart the appropriate distance.

Aluminum square tube would make it very light and somewhat easy to work with with decent rigidity. Round tube might be more gentle on the screen, perhaps a combination. Square for the uprights, and round for the width.

Wood would work as well, but I'm not much of a carpenter.

Lots of cheap collapsible screen systems out there, but you could cannibalize them for parts or put in your rear projection material in place of the standard material.

https://www.amazon.com/Elite-Screens-Master-Outdoor-Projector/dp/B00MAPCZEM

Thank you much for your reply & suggestions. Maybe they'll come on sale somewhere before May.