Sao Pedro de Penaferrim is a fantastic area to stay while in Sintra: same charm and genius loci but less crowds and obtrusiveness than in the historical centre, with some nice cafe's and restaurants and Palacio da Pena right above your head. Jorge's hostel is a decent place to enjoy Sintra and surroundings while on a budget as long as all you really need is a quiet place to take a shower, go to sleep and hit the trails first thing in the morning. Just keep in mind that there's no breakfast included and the bathroom is actually shared, enjoying Portugal unfortunately requires getting used to inaccuracies of this kind.