Just don't go any smaller than a 4" Commander size and you will not have any mechanical issues IMO.
Myth. While there are more considerations to parts tolerance stacking and timing, a properly built 3" gun is perfectly reliable. I have a first series Kimber Ultra Carry which has never, in over 7000rds, had a single failure with factory ammo, FMJ or JHP. Mine isn't the fluke, it's the norm.
a carry gun should only be 'fiddled' with by a licensed gunsmith. any non-professional mechanicals could cost you dearly in court.
As long as the modifications are reasonable and common, such as replacing the grip safety and hammer with a beavertail and bobbed set, there is nothing wrong with this. If you drop your trigger weight under 2 pounds or have issues that make your gun unsafe, you might have a legal issue over this, but most do-it-yourself mods and parts replacement require some very minor fitting. Not everyone will be able to do this well, it is very exacting and tedious work. You may make your gun unreliable or poorly fit, but I don't see any legal issues arising from this.
A full-sized 1911 can be carried every day by most anyone. There may be considerations such as dressing around your gun, you will require a good belt and holster, and dealing with a gun that is rather heavy.
A commander can lighten the load, but the concealment of a commander is the same as a full-sized. The only difference is 3/4" off the barrel, and the concealment is usually from the grip, not the slide.
So your options to get less of an obvious grip print, you can shorten the grip as in the officers and defenders variations, with 3.5" and 3" barrels, which are viable and reliable as an option, or you can bobtail your full-sized or commander grip, taking off the most obvious part of the grip, the back corner. It rounds it out and makes an unbelievable difference is the concealability. It is a mod that you can have a smith do to an existing gun you own, or you can by a Brown or Wesson already bobtailed. Or, if you are more mechanically inclined, you can buy a jig and do it yourself. I do my own and get great results. With some time and patience, it's much easier than it looks.