Question about low power tube amps and looper pedals without effects loop

I play only at home and my setup now is all pedals. I have a 1x12 cab loaded with a V30 speaker and an 100w solid state power amp giving it juice.

In this scenario I don't need an effects loop since my tone all comes from pedals. So i just put the looper after the preamp and modulation pedais, in the end of the chain.

But now I'm looking for a little tube amp head for playing at home and I am contemplating a JTM 1w head or a Princeton Tweed 5w head.

I play and practice almost always using the looper pedal. From jazz, funk, rock to metal.

Would the lack of effects loop, when layering loops, cause everything to distort in this scenario?

I play low volume, but i'm not really sure how much headroom these will give me before reaching tube distortion. If i keep the volume knob at 20% for example, will it be fine layering loops?