The hotel has invested 50 rooms in its budget.

When determining the hotel investment budget, the following factors need to be considered:

1. Number and type of rooms: the number and type of hotel rooms under consideration, including single rooms, double rooms and suites. Different types of rooms need different investment budgets.

2. Geographical location: The geographical location of the hotel is also one of the factors that affect the budget. For example, hotels located in the city center or tourist attractions need higher rent and decoration costs.

3. Decoration style and materials: According to the type and positioning of the hotel, you need to choose the corresponding decoration style and materials. From simplicity to luxury, from modernity to tradition, different styles and materials need different budgets.

4. Equipment and furniture: consider the equipment and furniture needed by the hotel, such as TV, air conditioner, bed and wardrobe. It costs a certain amount to purchase and install these devices.

5. Labor cost: the hotel needs employees to operate, and employees' wages, benefits, training and other expenses need to be considered.

6. Operating costs: including utilities, cleaning fees, maintenance fees, advertising fees and other expenses incurred in daily operations.

7. Permits and other expenses: To start a hotel, you need to obtain relevant permits and pay a certain registration fee.

After comprehensively considering the above factors, we can make a detailed budget plan and calculate the total budget according to the investment cost of each room. Generally speaking, the budget of hotel investment will be relatively high, and various factors need to be carefully considered and planned reasonably.