I made a graph showing how much money you would spend per inch of Aperture for each size of dob.
I didn't include Go-to telescopes because it's optional, it adds more cost and it introduces another variable.
There isn't much 14" dobs at all so it wasn't included. 18" feels like an odd number too.
I started adding custom made dobs at 18" and above. This is where I had trouble deciding when to include them because I believe while you can buy a custom 10" or 12" dob for 3-4k, most people still buy manufactured telescopes and custom dobs are a lot more expensive 16" and under. At 18/20" this is the largest size you can buy before having to go custom-built and they don't really have that much of a cost advantage anymore. I know people start to buy custom dobs around 12-15" so it's not going to be perfect.
This is the list of telescopes I used to calculate the average cost.
Some custom-built telescopes have two different price options to pick so I picked the lower one (ex. f3.3 or f3.6).
I might not include every single model of dob for each size or every single company you can buy a custom dob from. Only enough to get a ballpark estimate of cost.
Tell me what you think.
Edited by JKruger13, 10 August 2020 - 04:11 PM.