Hi,
We are just back from Lisbon, Evora, and Obidos. We spent 6 nights in both Evora and Obidos.
I would say four days in Evora would be good enough. We really enjoyed our time there and had a great house through airbnb. But a couple day trips out of Evora...one-half day to megalithic stones, and the perhistoric paintings in a cave 7 miles east of Evora. Monsaraz is nice, takes more time driving there than it takes to tour. A day to Elvas, and Estremoz, for walled cities. A day in Evora.
An evening meal at the #1 restaurant (Botequim do Mauraria) in Evora, costs about $60 for two ($30 each). But we had everything. It is really dinner and a show. the place opens at 7PM get there by 6:30 and stand out side the door facing the street. Only seats 9, and squeezes in a 10th. It is the experience you are getting. The food is good too.
Obidos is a really nice walled town. (4 days?) Nice place to stay through booking.com. inside the walls. Day trips to Nazare. Another to Fatima (?), another to Alcobaca, and Batalha (monasteries). Don't pass up meals evening meals at Muralhas, just outside the city walls. Very nice meals, a bit unique as it is not tipico Portuguese treatment. A day in Obidos, and walk the walls toward evening.
Lisbon...skip restaurant O'Eurico. It gets high ratings on tripadvisor, but is not really worth it. Can't get enough of this city. Ride the trams 28, 12, and 15. They take you around the castle or out to Belem (15). A mass transit pass is available for Lisbon, Via Viagem. The card costs 1/2 Euro, then you charge it up, one card per person, and end up saving about 40% per trip.
wayne iNWI