Papua trip, Lake Kutubu, Tari

Is anyone knows how much time (how many hours) by land transport from mandi to pimaga - Moro - lake
(i guess this is the road to the lake)
Is it in good condition?

Any advice about Tari?
how many days is sufficient? Road is good and transport frequent there? (Mendi- Tati) How much dollar aprx.?
Thanks for advice
Gabor