suspension straps training?

Definitely cheaper.  Basically mine is a system of handles, tubular nylon (for strength), and various fasteners.  I sewed things together with an awl, easy to use even with limited hand function.  Later, I decided that tieing in the D-rings would have been a lot easier, using the 0.5" tubular nylon!  Attachment to door as shown in video is not safe, IMHO.  I put bolts into framing of my garage for safe attachment, and made system so that it was adjustable from floor level with clipping into different lengths.  I also can attach weights (recycled from old window frames) to use for lighter exercises.  Sorry, I do not have the energy and time to draw out the whole thing for you, but am including links to the products I used.
awl~https://www.strapworks.com/Sewing_Awl_p/awl.htm
handle~search for "handle" at strapworks.com
tubing~http://www.strapworks.com/Tubular_Nylon_s/62.htm   I used 0.5" tubular nylon.
D-rings~http://www.strapworks.com/Metal_D_Ring_p/mdr.htm  I used the 0.5" size, which goes with above webbing.
opening fastener~http://www.strapworks.com/Carabiner_p/caro.htm  Used these for strength, locking not necessary. 
call John at Strapworks, 541-741-0658 or email him, john@strapworks.com with product questions

Basic idea is to create unbreakable bands that you can use your body weight and angle to substitute for free weights.  Use D-rings along the length of the webbing to accommodate types of exercises you want to do.  Handles are detachable and repositionable with carabiners.