I worked out a system of bringing the RIB aboard that is admittedly imperfect
, and stowing it on the foredeck which is closer to perfection.
I use a 6:1 block & fall attached to the spinnaker halyard that is set to adjust the height of clearance coming aboard. I hoist the dink level, "right-side-up", using a four-point attachment bridle fixed to the manufacturer's attachment points inboard of the tubes. With the painter secured forward near the anchor, I can hoist it fairly easily. The attached painter keeps it forward of the mast as it comes up. The imperfect part is that it slides up the topsides, then along the lifeline, so when it clears it wants to immediately swing inboard; so I stand up by the bow or at the mast. With some finesse I can lower it to the deck to check the swing. I quickly remove and reattach the block to an outboard stern rope secured between two eyes on the transom, hoist it by the stern; then stop off the line to a low mast jam cleat that I installed. I then go forward and flip the dink over using the hand grip at the bow. Now it's inverted. I lower it to the deck and secure. It's a little bit easier to deploy by doing the reverse of what I described. If the boat is steady, I can do the recovery or deployment task in about ten minutes, maybe less, not counting the time used to cover/uncover & tie/untie the dink. The 6:1 block and fall stays attached to the halyard secured at the mast so it's always ready to go; a dedicated piece of gear. If the boat is rocking or jerking much, it takes longer. So in calm, sheltered anchorages where the boat is steady, it's a simple task.
Please note the advantages compared to what one typically does. That is, to raise the dink vertically by the bow using the the spin halyard, and cranking the halyard winch. This is slow, hard work for the person at the winch. It takes two persons to do this. By the time the dink clears the life lines it is a huge pendulum, that now is lowered onto the deck. The method I describe takes one person on the block and fall, who is forward at the mast. The 6:1 purchase means I can raise and lower the dink by small amounts to position it using one arm/hand. The other I can use to hold on to the boat, or to steady the dink. I can do this task by myself in the morning while Admiral is making breakfast!
If I'm out by myself I can do it alone then as well; and I have.
If you do not wish to leave the dink in the water at night, you can hoist it up the topsides to the gunnel and secure it. It's completely out of the water. I think you could do this faster than lifting by davits. You could do it with the engine attached by adjusting the legs of the bridle so there is more lift at the dink's stern. You can get underway with the dink fixed like that. I would not try to cross the Georgia Strait, but I might go a few miles in sheltered water. What's more, you can deploy the dink while underway when it is up like that. Just lower back to the water and release (i.e., quick release) from the bridle. Just make sure the painter is attached to the yacht. Now you're towing. So easy. I've done all of these things.
Far cheaper than installing davits, plus a much more versatile way to manage the 9 -10 ft inflatable RIB on a 38 - 40 ft sailboat.