Check-in to a budget friendly small villa with private pool like 'Villa Bliss' or 'Little Paradise Villa' which costs approx INR 9000-10000 for 2 nights for 3 people (~INR 3000-3300 per person per night). These villas are located centrally making it easy to visit nearby attractions.
Explore these ancient Buddhist rock-cut caves located just 7km away from Lonavala. Open from 9am to 6pm, free entry, must see for history and architecture lovers.