There are a few approaches as you have indicated.
Scissor jacks are more popular with trailers. They are typically bolted on the frame. A cordless drill is used to quickly lower and raise them. Be certain, when folded up they don't hang down in a way that they could get caught scraping when exiting gas stations and such.
The tripod type are mobile, more adaptable & stable but do not self-store.
Here are your low cost choices at a glance.

Hydraulic jacks are ideal but are costly. They get fussy with age, weigh a lot, and also add technical complexity with wiring about the rig along with the controller by the driver.
One more consideration.
If your rig rocks and rolls when walking around inside it, What is it doing when you are driving it? Heavy duty front and rear stabilizer bars are very effective at reducing motion of both kinds. They won't offer rock-solid stability when parked, but may be enough as they are for us with our 24 foot B+ on an E350 chassis.