Short answer: yes, and the math is friendlier than most side hustles. Here is what a realistic weekend actually looks like.
One unit, one weekend
A single combo unit rented at $325 twice on Saturday and once on Sunday grosses $975. Subtract $60 in fuel and $30 in card fees and you clear roughly $885 for two long days.
The real constraint is delivery time
Each job eats about 90 minutes of driving, inflating, staking, and paperwork on drop-off, plus another hour at pickup. Three jobs in a day is comfortable. Four is a grind. Five is how gear gets damaged.
When to add a second unit
Once you are turning down two jobs per weekend for four weekends running, buy the second unit. A themed toddler bouncer complements a big combo and lets one crew run parallel deliveries in the same neighborhood.
Going full-time
Most operators go full-time somewhere between six and ten units, when weekend revenue plus mid-week weekday school and daycare events clears $8,000–$12,000/mo consistently. Get the software and the insurance sorted before the units, not after.