Let me expand a bit on why I said Buddipole.
A vertical is easy to set up, and breaks down into a pretty portable package.
However, it is not always easy to find the space for the radials, and without the radials, it is not going to work well at all.
If you are sure you can find a wide open space and lay out radials, that is probably the best way to go.
For multi-band use you are almost certainly going to have to use a short vertical with base loading coils. The shorter it is, the more critical the tuning.
Dipoles are large. Unless you trim them, and compensate by adding inductance (tuning coils).
The shorter you make the dipole, the less efficient it is, and the more sensitive the tuning becomes.
Dipoles need to be well off the ground, otherwise a lot of the energy goes into warming the clouds.
But, this doesn't necessarily mean that you need a tall mast. A shorter mast placed higher up (on a deck, for example) works well.
Similarly on a flat roof, on the edge of a "cliff" (just a sharp-ish) drop-off works), or even in a hotel room 5 floors up (not ideal, but it can work).
The Buddipole deluxe is nice because it has a center mounting device that allows you to mount coils/arms either side to form a dipole.
Or, you can swivel it around and mount one coil and all of the "arms" on top, forming a vertical, and attaching radials to the other side (now the bottom).
The basic deluxe kit works. But as you play with it you will want to spend a bit more money - e.g. a guying kit. You can make your own, but by the time you have finished, you are not likely to save much money over buying one from them. Same with the radials for vertical work. If you want to do much work on 40M you will probably want to buy some extra, longer "arms" to make longer dipoles for better efficiency and easier tuning.
For tuning, I would suggest a NanoVNA. It does make life easier, and is pretty cheap.
This isn't to say that all of the other suggestions here are not good - they are. I am just telling you what *I* think. You (and others) may have quite different ideas.
https://www.buddipole.com/debupa.html