You'll be right if you give yourself time to learn how it all flows. It's not a five minute thing. I am in no way being disrespectful. When you DIY time doesn't matter. But when you sell; while you mustn't ever rush it, you need to move as quick as your tools permit you to. Whatever investment you make, learn it backward, upside down, sideways and inside out. Because it's your business now. You need to command that thing like a BOSS.
A traditional tank porty would be a terrific compliment to your auto setup. Open more doors to more jobs, particularly small one and two roomers and upholstery bookings make more sense this way in general too.
Short hoses are your very best friend. Either go all out with boosters and leave the porty outside like a TM, or have it right on top of your arse like a ******* vacuum cleaner from the Deathstar. Today I did a job with my Nautilus, no vacuum booster and a 5m or 16.4ft of vacuum and solution hose. I filled with customer hot water and used my electric heat. Filled two additional buckets of hot water after the Nautilus was brimming full and I had my pre-spray down. Connect up the RV and go. Carpet was almost dry by the time I packed up and the cab arrived to take me home.
Another way to look at it is by using only what's needed to get what's needed you save time and money. Like
@Nate The Great , I'm just a low cleaner. I don't see well, the equipment is almost as big as me. I weigh 72Kg / 158lb the Nautilus weighs 62Kg / 136lb. But in three hours I cleaned a 4 x upholstered microsuede lounge suite with chase that was filthy and a small living room expanse of while wool carpet that as filthy.
4 x $50 Upholstery $200
1 x Carpeted Area Hot Rotary Extraction $80
$280
280 - 7% = $260.40
$260.40 / 3 = 86.80 Per Hour
Not bad for a porty in a home with a job thats neither big nor small and you can still make good coin.
So get after your friends and family and use your tools as much as you can until you can set it up by feel, it just flows and feels quite natural. That's how you're going to make money.