Site planning is everything, so much may be moot until you get closer to that perfect piece of land, and can see the lay of things. If you have to live in an 8'x16' space until the "big house" is built, you may not want the IBC & other utilities in there with you.
For water, dig a half-deep hole, plant the IBC, build rock- or cordwood-wall around it, cap with roof/hatch; this should be enough to protect it from 3 seasons (insulate for 4th season). Now your first "shed" is fully available for living in, vs storing utilities.
Given your particulars, I'd build an 8'x16' skid-platform (in a weekend); skids means temporary, so no codes (although you still build it "better than code") & no property taxes. See the "m-permieable" thread, here:
(this is an 8'x12' platform, although it may get the tipi/yurt treatment until lumber prices come down, if ever)
Two end-walls with two a-frame walls later, you have a full a-frame structure with more than enough slope to shed U.P. snow load. Roof becomes siding, on the a-frame walls. End walls get the cordwood-wall treatment, for experience & visual appeal. If you extend the a-frame walls on either side (half-diamond pattern, if you can picture it), you end up with more front/rear porch area (could be decked later). This becomes guest house when you're done with it. If you are tall, as I am, many a-frame designs out there with a-frame wall "poke-outs", so no a-frame "slope-phobia".
Back half is kitchen/bath, front half is living ... either bed or storage in loft area (if you finish that out at some point).
Truck water to buried IBC, gravity dump ... small electric pump up to a-frame, and fill water carafe w/ 2.5gal jug on it. All utilities on common wall; spin carafe/jug, and it serves both kitchen sink and shower ... instant water supply.
Small gennie, battery-bank, inverter ... instant power.
Depending on your code/zoning, may need full OSSF (septic system ... not instant wastewater) before setting foot on the property, or portable camper toilets & portable blackwater tote ... instant wastewater (greywater onto the ground from shower area).
Did I forget any "instants" ... woodstove for heat (instant hvac, w/o the ac). Should also heat the water.
Really, REALLY helps to have a site plan to figure out how all systems tie together. Scratch one out on paper, adjust when the land is found.
Hope this helps ...