Some good suggestions here. You really need a 2 channel amp with dedicated eq's for ea. channel. IMO, steel eq settings have too much low end for guitar. At least, for the tones I like.
Anybody that reads my posts prolly knows I've used a TubeWorks/MosValve component stereo rig for many years. A dedicated power amp and a 2 channel preamp with a multi-fx rack, either built into the pre or stand alone and satellite speakers.
That always seemed to be the best to me. That way, you can have all your settings for both steel and guitar beside you and available with the twirl of a knob and the flick of an A/B switch.
I still think that's the best...such as an old Roland GP100, one of Peavey's ...Fex units, Q-Verb GT or others with a built in preamp into a separate stout power amp.
Lately, I'm trying 90s era MosValve
RT2100 2 channel 100W mono amps. I have both a combo amp with a BW 1203 installed and a head only version I can use with cabs loaded with either 1201s, and/or 1203s. A mono version similar to the MV982 combined with the RT922 pre and Real Tube reverb circuit.
The proper 12 in. speaker will work fine for steel guitar as well as guitar. Even preferable in my case. A tighter sound in the mids and less boomy, but to each his own.
The combo weighs around 40#..less than a NV112 and is a little smaller than those. These amps are very warm sounding and quite powerful. They have a second low input which I use for steel's hotter pickups and use the number 1 input with guitar.
Using an old Boss SE70 programmed with settings for both steel and guitar hung on the side of my seat.
A foot switch lets me click on the Drive channel. It has a separate eq section, a switch for stacking both channels together, can be set to be rowdy or just eq'ed very clean as a second channel for guitar...and use the se70 for guitar friendly edgy or other fendery etc. type sounds.
These 100W amps are quite sufficient for the types of things I occasionally do.
This is all outdated 1990s era gear by some folk's standards and some of it is getting scarce, but it has the sound I like and it's versatile enough for both instruments. They used to be found for around $200, but now rare and pricey if you find one. If found at a reasonable price, I think you'd like it, but you'd need to swap out the speaker for a BW, TT, Emmy neo etc. for a good steel tone.