Power meter or smart trainer

First I was all PM, then all smart trainer, but now I don't know, humor me here.

I've been into triathlon for about 5 years although last year was total year off due to kid #2 and work and house #2 so this winter I got back into cycling and love it and the indoor rides fit my schedule very well so I'm kind of sticking more to the bike for now. I'm doing 3-5 rides a week mainly on Zwift or just watching TV and doing intervals of certain levels at cadence/pace via my watch. I'm not aiming for any races in particular, just looking to get faster and enjoy riding. I like to see gains, it keeps me motivated and makes it enjoyable to me, so while there's no FTP of 3.0 W/kg goal or anything like that I'd just like to keep progressing. I'm not currently on a training plan besides riding when I can which right now is keeping my FTP on the rise which is great.

Once the weather permits I'll probably do 1-2 outdoor rides per week on the weekends when I have time and daylight and the other 2-3 rides will be indoors on the trainer. So, assuming both cost roughly the same (~$700) which one would you go with, a smart trainer or a power meter?

My reasoning for the smart trainer is to keep Zwifting/TR and get good power readings off that and to step up the intensity of those Zwift climbs and just get a more realistic experience. For the time being the indoor rides just work well for getting the kids to bed, working all hours, etc and obviously work well Nov-April.

The flip side being a straight up power meter for the bike. Could still use my non-smart trainer and get good power numbers and work with everything the same way and take it to the road. Like I said, I don't have any specific races I'm looking at so the rides off the trainer would be mostly group rides with people from work and trying to hammer local Strava segments like any self respecting person would do.

Right now kind of leaning Smart Trainer because of the more use I'd get out of it year round but with the warm weather coming a PM would force me to ride outside which is undoubtedly just a better all around experience. I guess I could throw in option 3 of working a couple extra hours, getting a PM now and a smart trainer once the weather turns south in the fall but not sure I want to drop that coin right now. Thanks for the input!