Who arranged the meeting?

When Boaz went to gates of Bethlehem (Ruth 4:1), did he expected to meet the kinsman-redeemer, or was the meeting fortuitous?

According to Robert Hubbard in his NICOT commentary on Ruth it was to be expected:

Everyone had to pass through the gate en route to the fields, the threshing floor, or other cities. To meet him there would facilitate the speedy settlement of this matter; Boaz would waste no time searching for him. (p. 232)

However, Daniel Block takes a different view in his NAC commentary on Judges and Ruth:

With a superficial reading of the book the timing of the kinsman-redeemer's arrival may seem coincidental, but a deeper reading will recognize again the hidden hand of God. (p. 705)

Was the meeting arranged by Boaz or God? Maybe there is something of both. Boaz could expect the kinsman-redeemer to use the gate at that time in morning, but could he be certain? Perhaps he was trusting God to bring about the necessary meeting.

All through Ruth the main characters seem to take matters into their own hands, yet be very reliant on the God who is very obviously in control of these events.

I wonder if the people of Ruth's time had debates about freewill and the sovereignty of God?