A council have a home visit team of $5$ people, who each work $48$ hours a week $($ including Travel time$)$ Labour costs $$50$ per hour. Currently each worker spends $10$ hours travelling between visits, and work independently of one another.

A new piece of software could reduce travel time by $30\%$ The software would cost $100000$ to implement with a $$100$ subscription fee per week. The time saved allows for more visits each week, with a visit$($ inc, travel$)$ now scheduled to last $3$ hours. The council has a backlog of visits, with each additional visit completed per week valued at $$340$

How long would it take to get a return on investment? What other consideration may need to be made.