nobody say to you that you have to build the arena exactly
now you say it ....but i thought that i can change the price of tickets to maximum and then if the arena is full to build again
Just so you are aware, the price/attendance is non-linear.
So for example if you have a ticket price at $20 and get 1,000 people, if it was linear then at $10 you would expect 2,000 people ($20k revenue either way).
However in BB at $10 you might expect 4,000 people ($40k revenue). Note I don't know the exact %, this is just an example.
So there's a lot of benefit to expanding the arena even if your tickets aren't at full price.
ast days i spent 600k on stuff for example because i wanted at least 5 level coach since my trainees are already 20yo and maybe its possible to be u21 NT ...also, i bought 2 good bulgarian players for 600k.... once i built the arena and it was very expensive but maybe it was mistake to make VIP places also i have all kind of stuff and i pay 100k each week and i am not sure if i need all kind of stuff or not ...for example the dietary guy is under question
Yeah it's fine to spend some money if you have good NT/U21 prospects or a long-term player for your own team. It's unlikely the diet/nutritionist is worth it, but it depends on their salary, how much you want to spend, what the U21 coach thinks and so on.
i have 100k salaries for all the staff which i think is good because i optimized it a lot last days but i spent 600k for buying staff... i hope i can make some savings but i am not sure about that since everything is expensive nowadays
$100k is a lot for staff, even for an U21 prospect. So if in a couple of weeks you're still stuck financially I would review that to see if you could make savings.
Without looking at your actual economy I suspect you will be ok. As I said when paying the salary floor it's usually quite easy to make money, and at the start of the season you also get money for winning BBM and cup games. In a few weeks your economy will likely look better.