update hint text

app/models/form/sales/questions/number_of_others_in_property.rb

@@ -5,9 +5,19 @@ class Form::Sales::Questions::NumberOfOthersInProperty < ::Form::Question
     @check_answer_label = "Number of other people living in the property"
     @header = "Besides the buyer(s), how many other people live or will live in the property?"
     @type = "numeric"
-    @hint_text = "You can provide details for a maximum of #{joint_purchase ? '4' : '5'} other people."
+    @hint_text = hint(joint_purchase)
     @width = 2
     @min = 0
     @max = joint_purchase ? 4 : 5
   end
+
+private
+
+  def hint(joint_purchase)
+    if joint_purchase
+      "You can provide details for a maximum of 4 other people for a joint purchase."
+    else
+      "You can provide details for a maximum of 5 other people if there is only one buyer."
+    end
+  end
 end

spec/models/form/sales/questions/number_of_others_in_property_spec.rb

@@ -33,7 +33,7 @@ RSpec.describe Form::Sales::Questions::NumberOfOthersInProperty, type: :model do
   end
 
   it "has the correct hint" do
-    expect(question.hint_text).to eq("You can provide details for a maximum of 4 other people.")
+    expect(question.hint_text).to eq("You can provide details for a maximum of 4 other people for a joint purchase.")
   end
 
   it "has the correct min" do
@@ -48,7 +48,7 @@ RSpec.describe Form::Sales::Questions::NumberOfOthersInProperty, type: :model do
     let(:joint_purchase) { false }
 
     it "has the correct hint" do
-      expect(question.hint_text).to eq("You can provide details for a maximum of 5 other people.")
+      expect(question.hint_text).to eq("You can provide details for a maximum of 5 other people if there is only one buyer.")
     end
 
     it "has the correct max" do