I trim horses feet and have done hours and hours of reaserch on this kinda stuff.
oh boy! you asked a good question! and one that goes way deeper than im sure your interisted in so I will try and keep it short. if it were my horse I would not put shoes on him. there are lots of reasons not to shoe horses, I wouold be happy to send you some links if you are interisted, and being that you never mentioned your horse having major soundness issues I see no reason to put shoes on him. metal horseshoes will make them slip more. shoes may not really efect stone bruises, however because the horses feet lack constant contact with the ground the sole will not be as hard, so they will bruise easier. also shoes hold in dirt and muck and so horses with shoes are more likely to get thrush than those that are barefoot. I could tell you all the reasons for these things and how shoes mechanically effect your horse from short term to long term effects on the joints etc, but I am ttying so hard to stay away from that lol! if you would like all the details PM me. but in short, I promise I know what I'm talking about and I have reaserch to back it up. and it is easier for a lot of people to think about it this way- horses feet are like ours. the sole of the horses hoof is like the bottom of our foot. without a shoe restricting it it flexes and stretches and bends. the more we walk barefoot the tougher our feet/soles get. they get calises. dead skincells sluff off. we adapt to how we are using our feet, and so do horses. a horse will act sore while walking on a gravel driveway, just like us, if theyre not used to it. but if they do it every day, just like if we do it daily without shoes, they will build up calises and soon they are comfortable and its no big deal.
I would take your money and buy some good easyboots or whatever you choose that is comprable. you can put them on whenever you want, they shouldnt slip like metal shoes. your horse still gets to be barefoot. if you are concerned about the concrete being abrasive and wearing down his feet to nithing the boots will stop that too. the boots give added cushion to the street and you can always add pads. and you should get a lot of use out of them for the cost of less than 2 months worth of shoes... for a whole lot longer than 2 months
hope it helps!