In theory, that could work, but it all depends on your installation and the water table around the well point. This is certainly not the recommended installation.
Its is out side
No the pipe will brake use galvanized steel or stainless steel pipe for this sandpoint
There are too many variables that come into play, besides the size of the Well Point. The depth of the well, distance, volume of usage, etc. I'd consult with a knowledge person in this instance and try to determine the best pump that will suit your particular needs.
No, its Ment to be used as a drive point . also it will not fit inside an i.d. that is the same as its outside o.d.
Maybe a few more gallons per minute but it also depends on the performance of your pump. An 1 1/4” point is more than sufficient to do the job. If using a 2 hp lawn pump you could consider a 2” point.
Just be careful as 1 1/4" pipe may not accommodate standard foot valves. Lucky for me I have a South Bend 9" and could machine a Brass foot valve to fit the 1 1/4 pipe and couplings.
We haven't gotten that far yet, but just go to you-tube and do a search - how to drill a water well with sand point - you'll get many videos that show the common geo structure - this one is pretty good - https://youtu.be/mV2GHE8G-E4 and this one https://youtu.be/8ee5dI8xYXI Usually 10 ft minimum from what we've seen - which is about where we are now -
Should be no problem