My neighbor has thornless raspberries. Same species, they were just selectively bred so they will work. $20 is alot for any raspberry. And I'm sure you will get a tiny plant that you can't use for a year or more. It would be 2 years before it could be your main source. Also thornless doesn't mean no thorns... Look at the pic of the girl eating one off the plant.
As for the leaf litter... Holy Crap! My oak tree is worth a million bucks. Lol. A lot of stick nymphs won't eat oak. My adults barely touched dried oak. It needs to be frozen fresh apparently.
I can ship you fresh oak leaves (wrapped in a bag and misted, they should last) live raspberry and\or live rose (with roots) for the cost of shipping but if you look around, unless you are deep in the city, your neighbors probably have some. And probably would let you dig up a plant or two or cut some oak for free
.