I support the Dobsonian suggestion though, as noted, it’s not suitable for long-exposure imaging. Lucky imaging of planerts should be fine as each exposure is so short that trailing is likely to be completely overwhelmed by the seeing and / or diffraction. (Maximum drift is 15 arcsec per sec for an equatorial target, or 0.15 arscec at a frame rate of 100 fps where you would need almost a one metre aperture for diffraction to be an issue.)
Indeed, back in the day I kept an 18″ Dob. in my kitchen. Made of plywood, it was still a reasonable task to lug its two sections out onto the back yard for an observing session. Current designs are lighter still. There is absolutely no way that a traditionally mounted 18-incher could be regarded as portable.