Unlike Grey I keep my KB 350 on a 350 bunk trailer 24/7 and it has been that way since I purchased the boat back in Feb 2020 and trailed the boat to Galicia Spain from Cheshire, I am a reasonably fit 71 years and for me I would not have any other way.
Some of the reasons.
Just have to hook it to the car and away I go.
Takes no time at all to pull it off the trailer onto its launching wheels and roll into the water, plus putting it back on the trailer (No inflating or deflating or lugging a outboard in and out of the car,
Can keep a regular check on the tubes and floor.
Easy to clean after each trip and to do it in your on time.
The outboard is always on the boat so no lifting it on and off. (I had to extend the bunks to support it)
Before going out just connect the muffs to the outboard and start it, as it is always better before getting to the water, Makes it more convenient to start it at regular intervals keep the oil & water circulating.
It is always covered.
The down side is buying the trailer which I was luck and got mine of Ebay for 475pounds plus you will have to extend the bunks to support the outboard.
Hope this helps with considering what way to go.
Photot below
Good to see you are still around Grey look forward reading some fishing updates.