Mooring and tying to a dock are two different things. I think you were referring to tying your boat to his dock.
I did that once and, as far as getting out to fish, it was wonderful. Go to dock. Get in. Start engine. Fish. I did have to drag my gear on each time, as the dock was next to a bar. Too many guys walking by every evening to leave much on the boat.
I didn't have a cover, nor did I want a cover, since it would be a PIA to put it on, take it off, and then store it someplace every time I went out.
Not having a cover created a problem when we'd have torrential rains. After I nearly sunk the boat..... since no one was there to turn the bilge pump on....I installed an automatic bilge pump to deal with the rain., That created a problem since I had to charge the battery constantly.
The dock had no electricity, so I had to drag a long extension cord from the bar outside outlet to the boat, hook up the charger.....go away for a few hours...and return to pull the cord off, before the drunks showed up. I lived about twenty minutes away, and it seemed that I was always driving back and forth to deal with something. That was fine since I was retired.
All in all, I'd do it over again in a minute. Just being able to jump in the boat and go fishing in ten minutes... was worth whatever I had to do to keep her tied to a dock.
I also owned a 14 foot pontoon boat once. For the same reason that you are talking about buying one. To take my wife out with a bottle of wine and watch the sun go down. We did that, maybe, four times in four years.
The rest of the time, I was blown all over the lake due to the high deck and high sides inherent in pontoons. Fishing was a disaster in that thing.
Most boats do one thing well, and other things not so well.
They say, buy a boat for what you do 80% of the time. I agree, but I think 90% of the time.... is a better factor number.
regards, richg99