First let me say that you are looking at a HUUUUUUGGGEEEEE 5 x 12 trailer there. Yes that is all fit on a trailer of that size. For many of the reasons you listed it is the way this trailer and the future one to be placed on the road will be. Plus figure in that I live in Florida which has many toll roads. One toll road close to me has a min. fee of $2 to cross at one point. That fee is for two axles cars and trucks. Each axle is .75 cents so the cost of tolls can add up to those lawnturds that feel bigger is better in terms of trailers. Imagine the cost they would incur in a years time of traveling tolls alone, not to mention the fuel consumption that you mentioned with a larger heavier trailer. In terms of the cost. The 3500lb axle had to be replaced at that time and I can not remember exactly the difference of changing over to a 5k axle compared to another 3500 but it was a very small amount. I am sure it was under $100 difference if I recall but can not say for sure as it is not clear at this time to me. Bigger trailer is the way to go to a point...but the key is to make sure you are using every inch of the trailer you purchase in the most effective way. If you can accomplish what you need to on a 5 x 10 then why go bigger. Utilize your space and set it up to be effecient. If you notice the gas can rack is on the side of trimmers and primary blower. This means it is located to allow us to refill these items with the min . effort possible. The trimmer line spool rack is here too for the same reason. The first backpack blower is located on that side too as it is most likely that the person doing the edging and trimming will be done and putting that equipment up prior to me completing mowing a majority of the time. So once he puts up the sticks he is on the side to grab that blower. The other blower is located on the other side so that I can put the mower up and grab it to assist blowing off accounts. The main spray rack is located on the same size of the trimmers as it contains Round up and is the most used back pack sprayer. The one located on the passenger side is used on less accounts as it is used for liquid fert and pest control on the shrubs and beds. Located in the front tool box are chemicals. Edger blades. Irrigation heads. Chainsaw. Located at the front this allows me to reach the chemicals for appropriate for either back pack sprayer form either side. Thanks for noticing the layout ....not as many have mentioned the layout of the trailer as I would of thought as this is a critical component IMHO in making your day go smoother.