It normally only takes a couple minutes with the flame on. In cold weather, I've left it on maybe up to 5 minutes. During the summer, it's only a minute or two.
I can get quite a few cooks out of the 1lb canisters. For my space, another 20lb tank would be clunky and crowded. I do have a 5lb can that came with the SSP I got. I was able to get it recertified at the propane shop nearby for $5. Since you just got it, try the 1lb tanks and see if you need to get a bigger tank.
FWIW, I use the propane start on my performers with a chimney. No newspaper. Just put the chimney over the flame then you can spread the coals how you want them. Takes a couple minutes to light.
How long do you leave the flame on while you have the chimney over it?
Sent from my Nexus 5X using Weber Kettle Club mobile app