SMS campaign for a residential complex under construction

Problems
The most effective method of selling an apartment in a new building before the building is put into operation is a personal meeting with the developer. The sales department worked with cold calls, there were almost no visits.
The goal
Bring future customers to the company's office, encourage them to visit the sales office and personally inspect the object, establish personal contacts.
Solution
The company's employees collected a small database of persons potentially interested in purchasing a new apartment (400 contacts). An SMS-campaing with an invitation to a personal meeting was offered.
Result
The client spent less than $50 on sending out messages. As a result, 40 new calls were received and 20 new sales visits were scheduled with potential buyers. The main advantage is that the customer saved considerable time and money, managers did not have to spend a working day on inefficient calls.
50$
amount investment
10%
CTR
40
received calls
20
potential clients