"Bigger teams are paying up to 5 or 6 players. Will all the teams pay at least some of their starters? If not, which are likely to not have the finances?"
Melbourne Tigers would have had a smaller budget than Ringwood, but DV and Frankston would be higher. Then Sandy, Nuna, Kilsyth and Dandy would be higher again (maybe $70-80k). The country teams go big some years and not so big other years. Albury probably about the same, Ballarat and Bendigo probably more. NW Tassie are just under the big Melb teams ($60-70k). Hobart could have been anything this year - my speculation is that Moller might have been paid more than some entire teams.
The pre-2004 BigV days saw some teams able to compete without paying anyone anything (e.g. Blackburn, DV), but those days have long gone. Few Melbourne teams then had imports (or crowds to pay for imports). Drawing in players like Luke McMillan and Daryl Corletto saw teams start to tool up to compete. Waverley started investing a lot in seniors, Melbourne and Dandenong joined BigV and the landscape changed.
Some BigV clubs spend pretty hard to entice players away from SEABL for more money and they might have hefty player budgets. Some imports are cheap as they are not here to primarily play basketball and their salaries are not dictated by the minimum requirements. Some Aussies play for the fun of it. It's hard to know exactly, so we use a little inside knowledge and a little speculation.
Expect the teams from BigV to struggle to step up their player budgets in 2019 as they just agreed to pay an extra $15K just to join this new league. To quickly find anymore money for players would be very hard. I suspect Waverley would be the exception as they have had a track record of paying players well.