- Forget the wire option. It is ancient, primitive, and prehistorical. Can I give more emphasis to his?
Probably the two best options are Yongnuo and Godox.
Pros?
Price, and, IMHO, reliable. I have some Yongnuo manual flashes, for studio photography on location, for some years, and still work fine.
- Cons?
I think some Yongnuo flash models need a different trigger between them. It is obvious for a manual flash and a TTL one, but I think also on the signal. In any case, think a bit ahead on what your needs are.
- A cheap option for studio photography?
I would recommend a combination of Speedlight flashes (and rechargeable batteries). I can use them on a big softbox, but as the power is limited, they are close to the subject. You need an "S studio speedlight adapter with Bowens mount".
But also I have some strobe heads with more power that do not use batteries. You can even have a non-radio-triggered one as long as it has an optical slave.
Just see that all have a Bowens mount. It makes life easier.
There are two types of radio triggers, a trigger only and the ones that allow you to change the settings on the flashes remotely. I have one trigger only on my camera because it is less bulky, and I have the controller in my bag when I need it, only at the beginning of the shoot.
An additional tip. Try to get some softboxes, not the "umbrella-like" that has the strobe head inside. It has a limited range of movements.
A white umbrella solution works on high-key portraits, but you will struggle in low-key situations. So get one or two softboxes.