How many models at a time should be built?

it takes super discipline and incredibly hard to do in real life, but you should really do 1 model at a time start to finish.   Even if its a bad model, a simple model,  or something you might throw away, there is something to be said about complete finishing something.  Like I said its tough in reality to do this.  Every week I want to start something new, so it takes super disapline

I don't have the space to do more than 1 at a time. But I'm not organized enough to keep up with more than one at a time, so I guess it works out. . When I've got one in progress, my work bench is a total mess until the kit is finished. Then it's clean and neat for awhile until I start my next project.

Two is the max for me.

I found out that I much prefer to build 3 at a time :

a land vehicle

an aircraft

a boat

no more, no less

I work one till I get my fill of it, then work on another already started on I lost interest in before, I think I have four started projects at the moment, maybe more, I'll have to look once I get home