Binding oneself to a construction company is still far too early. Reaching the fourth draft already and still missing entire rooms is a very clear sign of a maximally wrong approach: skipping the conceptual planning, drawing straight away. The effect is dissatisfaction with the "result," but this is no bad coincidence, rather a causal connection. This is not construction planning, this is lead pouring (so long before New Year's Eve?).
Children not yet ready for school like to do it this way: listing all kinds that they have already liked or whose names they recently learned. The ice cream sundae then not only cost a fortune, but an upset stomach would also be guaranteed, and even the largest bowls would require two so that all scoops fit. Too expensive? – hmm, so leave out the cream or maybe rather the waffle?
So the order form is crumpled up and a new wish list begun. Now the fourth one, which still doesn't fit, and therefore won't be the last. Maybe a lifeline, yes, call grandma, damn – answering machine.
A friend who helps with drawing the little house, unfortunately only an architecture student. Then a construction company is supposed to refine it for a building permit, for that you just have to "get engaged" to the construction company. Lord, throw brains from heaven (in BY they would say "Maria help"), oh dear. Waking up is probably the only cure against this nightmare – and then do it all again like adults:
Create and qualify the room program, virtual wireframe model, preliminary design. That means letting the dough rest and setting the course, during which the budget is roughly calibrated. All this with a freelance, already graduated architect.
The choice of construction method derives at the earliest from the course setting, then the architect either matures the preliminary design used for the inquiry round or an alternative proposal (i.e., one of the answers to question 2 of the course setting) into the pursued design. Only in this are the windows given opening directions and the facade a material – not before.
Amateur designs regularly turn out about 20 percent too large (and therefore too expensive), having an architecture student co-draw does not cure this phenomenon. And general contractor building-permit finishers only debug what would be an approval obstacle – they do not bring the hoped-for improvement from the professional’s sewing box into the planning. If your bank goes along, the construction company will gladly build the house too large. Even more so if you are willing to finish the house yourself at the end of the money.