You can add another Republican senator who is supporting the Ryan-Murray budget deal: Sen. Orrin Hatch (R-UT).
Hatch said in a statement:
Per NBC News’ count, at least five Senate Republicans say they’re supporting “yes” on the cloture vote -- Sens. John McCain (R-AZ), Jeff Flake (R-AZ), Susan Collins (R-ME), Richard Burr (R-NC), and Sen. Ron Johnson (R-WI). In addition, In addition, NBC's Kasie Hunt says that GOP Sens. Rob Portman (R-OH), John Hoeven (R-ND), and Bob Corker (R-TN) are on the fence at least when it comes to the decision about whether to cut off debate
So Hatch's support means it's even more than likely to have enough votes to pass.