It was understandable why Solisa would wear such an expression when she had always been careless.
One would never worry about daily expenses until one took charge. In reality, as the only daughter of a boss, she had enough money for her own use.
It didn't require much money to establish a loosely-organized guild of players.
However, after she established the Summoning Magic Tower, she found that her money was really not enough.
After they got a stable base, house maintenance and furniture were both costly.
She also had to prepare food and the necessary clothing.
For example, the "school uniform" of the Summoning Magic Tower had to be designed with good materials.
The materials and the designers had to be paid for too.
Although the summoning spell of the elves would automatically be learned after they reached the level, they would have additional slots after they became Masters and they could learn new spells.